Spinning fishing reel having a uniform longitudinal spool movement

Abstract

A spinning reel for fishing comprises a reel body casing formed with a cam groove, a rotational frame mounted to the reel body casing to be rotatable about a rotational axis thereof, a spool shaft attached to the reel body casing so as to be movable in an axial direction parallel to the rotational direction of the rotational frame, a spool mounted to one end of the spool shaft, a handle lever coupled to the rotational frame to rotate the same, an oscillator mounted to the other end of the spool shaft, an oscillator gear supported by the reel body casing so as to be rotatable about a rotational shaft surrounded by the cam groove in accordance with an operation of the handle lever, and an interlock means provided with a first engaging member engaged with the cam groove and a second engaging member adapted to transfer a motion toward the oscillator. The interlock means is coupled to the oscillator gear and driven in association with the rotation of the oscillator gear such that the second engaging member is moved around the rotational shaft while carrying out a relative motion in a circumferential direction with respect to the oscillator gear.

What is claimed is: 
     
       1. A spinning reel comprising: a reel body casing;   a rotational frame member mounted on said reel body casing so as to be rotatable by means of a handle means supported on said reel body casing;   a spool shaft slideably mounted on a cylindrical shaft of said rotational frame member;   a spool secured to one end portion of said spool shaft;   an oscillator secured to another end portion of said spool shaft;   an oscillator gear mounted on said reel body casing so as to be rotatable by said handle means;   a rotational plate disposed along a side surface of said oscillator gear so as to be rotatable;   a cam engaging pin formed on one surface of said rotational plate, said cam engaging pin engaging with a cam groove having an elliptical shape, formed on an inside surface of said reel body casing, which faces said oscillator gear; and   an oscillator drive pin formed on another surface of said rotational plate and connected to said oscillator,   movement of said cam engaging pin relative to said oscillator gear being given by a change in radius of said cam groove along with rotation of said oscillator gear causing said oscillator drive pin together with said rotational plate to move reciprocally relative to said oscillator gear, and a reciprocal movement of said oscillator drive pin causing a rotational velocity of said oscillator drive pin to be changed relative to a rotational velocity of said oscillator gear.   
     
     
       2. The spinning reel according to claim 1, wherein said rotational plate is pivoted on said oscillator gear so that said oscillator drive pin of said rotational plate slides reciprocally in the direction crossing obliquely the radial direction of said oscillator gear. 
     
     
       3. The spinning reel according to claim 1, wherein any one of said rotational plate and said oscillator gear has a guide slot formed thereon, which extends in a direction crossing obliquely the radial direction of said oscillator gear so that said oscillator drive pin of said rotational plate slides reciprocally in the direction crossing obliquely the radial direction of said oscillator gear, and another one of said rotational plate and said oscillator gear has a guide pin inserted in said slot. 
     
     
       4. A spinning reel according to claim 1, wherein said oscillator drive pin is displaced with respect to said cam engaging pin in a radial direction of said oscillator gear. 
     
     
       5. A spinning reel according to claim 1, wherein said oscillator drive pin is displaced by a predetermined angle with respect to said cam engaging pin in a circumferential direction of the oscillator gear.